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ROSAT Attitude Operations after Gyro Failures.

Feucht, U. (1995) ROSAT Attitude Operations after Gyro Failures. In: Proceedings Intern. Symposium "Space Dynamics, Toulouse, 19 June 1995 (1995), pp. 605-612. Proceedings Intern. Symposium ÜSpace DynamicsÜ, Toulouse, 19.6.95.

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Abstract

The X-ray astronomie satellite ROSAT is a cooperative project between Germany, USA and the UK. It is carrying the largest X-ray telescope in space in a 580 Km orbit with 53 inclination. Main contractor for the spacecraft was Dornier/DASA, the attitude subsystem was built by MBB (now also DASA). All operational aspects are covered by the German Space Operations Center (GSOC), Oberpfaffenhofen. The spacecraft is controlled via the GSOC ground station at Weilheim. This leads to a contact pattern of 5-6 consecutive contacts of max. 10 minutes duration, followed by an invisibility period of 15-17 hours. In case of contingencies there are more contacts via DSN-stations possible. The spacecraft is operated in 2 nominal modes, scan and pointing. In scan mode ROSAT is rotating with a constant rate about the axis satellite-sun with 1 revolution per orbit. After half a year the whole celestial sphere is scanned with the 2 field of view of the telescope by a 1 overlap. In pointing mode the satellite is directed to selected targets and slewing between them. The pointing mode is the nominal operational mode after scan until the end of the mission. In case of anomalies a safe mode is implemented which disables the scientific instruments and points the spacecraft to the sun.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1996,
Title:ROSAT Attitude Operations after Gyro Failures.
Authors:
AuthorsInstitution or Email of Authors
Feucht, U.UNSPECIFIED
Date:1995
Journal or Publication Title:Proceedings Intern. Symposium "Space Dynamics, Toulouse, 19 June 1995 (1995)
Page Range:pp. 605-612
Status:Published
Keywords:ROSAT, Gyros, Attitude control strategies, Onboard algorithms, Spacecraft Operations
Event Title:Proceedings Intern. Symposium ÜSpace DynamicsÜ, Toulouse, 19.6.95
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Hauptabteilung Raumflugmissionen
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 05:20

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